Crusher



R. E. TROTTIER.

CRUSHER.

APPLICATION FILED JULY 29. 1919.

Patented Jan. 4, 19.21.

2 $HEET$-SHEET l- R. E. TROTTIER.

CRUSHER'.

APPLICATION FILED JULY 29, 1919.

Patented Jan. 4, 1921.

2 SHEETS-SHEET 2.

1 4 ll p UNITED STATES RENE EMILE TROTTI'ER, OF PARIS, FRANCE.

CRUSHER.

Specification of Letters Eatent.

Patented Jan. 4-, 1921.

Application filed July 29, 1919. Serial No. 313,971.

To all whom it may concern:

Be it known that I, RnNii EMILE TROT- rmn, citizen of the Republic of France, and resident of Paris, Republic of France, have invented a new and useful Crusher, of which the following is a specification.

The majority of crushers with vibrating j aws which are in actual use operate by displacement of one jaw forming an angle more or less acute with a fixed jaw to and from which it is moved under action of an eccentric operating two thrust bars, whereof one is applied to a fixed point, or the eccentric may raise the end of a lever arm. This arrangement of parts necessitates heavy and bulky apparatus.

The present invention relates to a crusher having jaws which operate with a more uniform presure than has generally been the case and consequently the force applied is used to better advantage and at the same time the apparatus is of comparatively small bulk and weight.

The crusher comprises two jaws both pivoted at one end to a fixed frame and moved by means of a lever having its center of oscil lation on the axis of the apparatus and acting on the jaws through thrust bars. The crushing stroke occurs as the lever system and the thrust bars approach the horizontal position and the return stroke as they move away from this position.

Constancy of pressure is obtained by the compensation which is set up between the speed of oscillation and the degree of inclination of the thrust bars.

This arrangement permits the material reduction of weight of the frame, for it has only to carry the shaft of the cam plate (a plate which in practice is preferably in duplicate, one on each side of the machine) and the pivots of the two jaws. The jaws themselves are of the minimum weight compgtible with the resistance which they must 0 er.

In the accompanying drawings Figure 1 is a diagram illustrating the principle of the construction.

Figs. 2, 3 and 4: show a crusher constructed on the principle illustrated by Fig. 1.

Fig. 2 is a longitudinal section.

Fig. 3 is a plan and Fig. 4 is an end view partly in elevation and partly in section.

Fig. 5 is a detail sectional view showing one of the bearings of the shaft which carries the eccentrically grooved plate.

Fig. 1 shows two jaws a a pivoted at the points I) b and at their lower part subject to the action of thrust bars 0 0 pivoted at 03 d to a levere which turns about the fixed point f; one of the ends (g) of the lever is alternately raised and lowered by eccentrically grooved plates Z, while its other end moves obviously in an opposite direction symmetrically to a horizontal line drawn through the point The points d d Where represent the jaws closed and the dotted lines the jaws completely open.

Referring to Figs. 2-5 the crusher comprises a frame it to which are bolted two bearings '5 having feathers traversed by double keys which complete the fixing of the bearings (see Fig. 5). The latter comprise each a bronze bushing y" through which the shaft j extends. To this shaft are keyed a driving pulley k and the two eccentrically grooved plates Z which also serve as flywheels. The lever carries two bronze bushings g which receive the shaft 9 and are held in place by screws.

Thelever consists of two arms connected together at their ends and mounted outside of cheeks m of the frame between which the jaws move. At the middle part of the lever the upper and lower surface of each arm is a cylindrical surface, the two surfaces being mounted to turn between bosses 72. carried by the external faces of cheeks m, these bosses being indented in order to permit the oscillation of the lever. Bars 0 bolted to the cheeks m insure the rigidity of the assembled parts.

At its ends the lever carries seatings p for the thrust bars a 0. These seatings are supported on wedges q, the position of which can be adjusted by screws.

The jaws b b are lined with hard steel plates 1", r suitably channeled and fixed in place by wedges s s. In Figs. 2, 3 and a the channeling of the plates 1" 7" is vertical, thus favoring the descent of the material.

If desirable the pivot hole t at the upper part of one of the jaws may be elongated so as to allow this jaw to rise relatively to the other; this produces a sort of rolling effect on the material preventing choking of the channels and having other advantages according to the nature of the material being crushed.

Springs u a keep the jaws applied against the rods 0 0 when the latter are moving out of their horizontal position.

Having thus described the nature of the said invention and the best means I know of carrying the same into practical effect, I claim l. A crusher comprising two jaws, a pivot at one end of each jaw about which the jaw oscillates, a driving shaft, a disk keyed to the said shaft and provided with an eccentric circular groove in its face, a lever having means adapted to engage said groove for oscillating it, two thrust bars each mounted at one end in a seat formed on the said lever and at the other end mounted on one of the jaws respectively, a spring holding each jaw into contact with the corresponding thrust bar and a frame carrying the driving shaft and the pivots of the jaws.

2. In a crusher, a frame, a driving shaft mounted in the lower part of the said frame,-

two checks on the said frame adapted to carry two pivots, a pair of jaws adapted to oscillate on the said pivots between the said cheeks, a lever comprising two arms connected together at their ends, the two arms being outside the said cheeks and supported thereby so as to oscillate, two thrust bars between the said arms and applied at one end against the corresponding end of the said lever and at the other end against one of the jaws, a rotating disk carrying an eccentric groove and means on the lever adapted to engage said groove for oscillating it.

3. In a crusher, a fixed frame, two jaws pivoted at one end to the said frame, an oscillatory lever, a thrust bar arranged be tween each jaw and one end of the said lever, a seat at each end of the said lever to receive the end of the corresponding thrust bar and a device for adjusting the position of the said seat.

In testimony, that I claim the foregoing as my invention, I have signed my name this twenty-sixth day of June, 1919.

Vitness CHAS. P. PRESSLY. 

